QML ListView filter items

qml delegate index
qt proxy model filter
qml listview scroll
qml listview highlight
qml listview focus
qml listbox

I have a ListView table. I want to add some filter buttons to hide/show items of this table based on item type. The easiest way is set visible property of the item delegate. However, hidden items are still counted in listView.contentHeight, or listView.visibleArea.heightRatio. As a result, these values change when scrolling and affect the height and position of the scrollbar, it collapses, expands, jumps in no order.

Other issue is that in the listView, if an item is selected, there is no way to know its index, for instance it looks like it is in the second place in the table but actually its index is higher because of the invisible items. It could be nice if the invisible items are not counted at all.

Please help how to solve this issue. Thank you all.

  id: listView
  delegate: itemdelegate

  id: itemdelegate
    visible: model.type === filteredType ? true: false

Append items to your display model dynamically, f.e.

    for(var i = 0; i < myListModel.count;i++)
        if(myListModel.get(i).desiredProperty == "desiredValue")

QML List view Sort and Filter – Arun's Qt Corner, I have created a simple demo QML based application which shows a basic list view with text item on which user can perform the filtering and  ListView.Center - position item in the center of the view. ListView.End - position item at bottom (or right for horizontal orientation) of the view. ListView.Visible - if any part of the item is visible then take no action, otherwise bring the item into view. ListView.Contain - ensure the entire item is visible. If the item is larger than the view the item is positioned at the top (or left for horizontal orientation) of the view.

Supposing the data comes from the C++ side of your application, the proper way of doing this is to use Qt's QSortFilterProxyModel on your model.

If you are not already using one, here is the doc about using C++ Models with QML Views

Filtering in QML ListView · GitHub, This example illustrates how QSortFilterProxyModel and QAbstractListModel can be used to display a list of filterable items in QML and Python. The DelegateModel type is used by the view types to instantiate delegate items from model data and when constructed explicitly can be used to filter and re-order the model items provided to ListView. The items property of DelegateModel provides access to the view's items and allows us to change the visible order without modifying the source model.

I figured out to use VisualDataModel QML item for ListView filtering and it works very nice.

Using DelegateModel in QML for Sorting and Filtering, With its help, we can easily filter the list of items or reorder them. Where We Want to Get to: Model Sorting and Filtering in QML Text { id: item text: qsTr("​This is item #%1").arg(modelData) } } ListView { id: view property int  QML Dynamic View Ordering Tutorial 2 - Dragging View Items Now that we have a visible list of items we want to be able to interact with them. We'll start by extending the delegate so the visible content can be dragged up and down the screen.

You can set the width/height according to the filter condition. For example:

Rectangle {
    width: condition?100:0
    height: condition?100:0

How to implement a search/filter feature with listmodel and listview , FYI : it is QML application.i want to implement this with listmodel . height:1000; model: comboBox.items currentIndex: 0 delegate: Item{  QML Dynamic View Ordering Tutorial 4 - Sorting Items Drag and drop isn't the only way items in a view can be re-ordered, using a DelegateModel it is also possible to sort items based on model data. To do that we extend our DelegateModel instance like this:

DelegateModel QML Type, The example below illustrates using a DelegateModel with a ListView. define a sub-set of the items in a delegate model and can be used to filter a model. Groups define a sub-set of the items in a delegate model and can be used to filter a model. For every group defined in a DelegateModel two attached properties are added to each delegate item. The first of the form DelegateModel .in GroupName holds whether the item belongs to the group and the second DelegateModel . groupName Index holds the

SortFilterProxyModel QML Type, Allows to apply filter and sorting settings to QML ListModel items. More Import Statement: import Felgo 3.0. Since: Felgo 2.18.1. List of  A ListView displays data from models created from built-in QML elements like ListModeland XmlListModel, or custom model classes defined in C++ that inherit from QAbstractListModel. A ListView has a model, which defines the data to be displayed, and a delegate, which defines how the data should be displayed.

Adaptive List Filtering with QML, For example, if the list has two items, “Joe” and “Emily”, the keyboard will This way I could make the whole filtering fit into basic QML ListView  The idea is pretty simple: when a ListView is populated, or entries are added or removed to the model, etc., ListView can automatically trigger animations on the affected items.